New folk-* web components for collaborative trip planning:
- folk-itinerary: timeline with day grouping and category icons
- folk-destination: location card with editable notes
- folk-budget: expense tracker with progress bar
- folk-packing-list: collaborative checklist with progress
- folk-booking: booking card with type/status badges
Also adds postMessage broadcasting in community-sync for iframe
embedding in rtrips.online, and toolbar buttons in canvas.html.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
